CN103235195B - A kind of Non-contact static detection device - Google Patents
A kind of Non-contact static detection device Download PDFInfo
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- CN103235195B CN103235195B CN201310154390.3A CN201310154390A CN103235195B CN 103235195 B CN103235195 B CN 103235195B CN 201310154390 A CN201310154390 A CN 201310154390A CN 103235195 B CN103235195 B CN 103235195B
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Abstract
The invention discloses a kind of non-contact static detection device, comprise electrostatic transducer, electronic switch and electric signal processing unit; Electrostatic transducer comprises induction electrode and coupling electrode, and induction electrode is a metallic electrostatic signal receiving plane, and coupling electrode is a metallic electrode, and the two forms the electric capacity of a fixing capacitance; Induction electrode is electrically connected with electronic switch; Electric signal processing unit is used for by making induction electrode interleaved ground or suspension to the control of electronic switch, is also converted to electric field value for carrying out subsequent treatment to the alternating signal from coupling electrode collection.The feature that the present invention has mechanical parts, coupling capacitance variable quantity is large, highly sensitive, sensor design flexible, easily realize; By the selection to electrostatic transducer, can to carry out in real time tiny area electrostatic or faint electrostatic, absolute measurement.
Description
Technical field
The present invention relates to a kind of Non-contact static detection device, belong to detection technique field.
Background technology
Non-contact static detection device is the basic device carrying out electrostatic field or electrostatic detection, is widely used in the detection of static electricity on human body, body surface electrostatic and space static electricity field.The noncontact acquisition sensor used at present is all become capacitive, and comprise Spiralism type and capacitance-type vibration formula sensor, the two has mechanical part.
Spiralism type sensor comprises upper and lower two electrodes, power on the rotation electrode of the very figure of interval shown in Fig. 1, rotation electrode can around central shaft flat turn, electric capacity in rotation process between upper and lower two electrodes can change, thus to make between two electrodes interval produce electric signal, can electrostatic field be obtained by the collection of electric signal and conversion.But the mechanical rotation frequency of rotation electrode is very low in Spiralism type sensor, and only have hundreds of hertz, therefore detection sensitivity is low, the real-time detection to Rapid Variable Design electrostatic charge or electrostatic field can not be realized.In addition, under the restriction of processing technology, the size of rotation electrode can not design too little, is therefore difficult to the electrostatic or the electrostatic field that detect tiny area; That can not design is excessive, and so capacitance change will be restricted, and the rotation instability of large area rotation electrode also can affect the stability of measurement result.
Capacitance-type vibration formula sensor also comprises upper and lower two electrodes, power on very flat type, the capacitance variations between two electrodes can be realized by the mode of oscillation distance changed between two electrodes, thus make interval between two electrodes produce electric signal, and then obtain electrostatic field.Although the oscillation frequency of capacitance-type vibration formula sensor is higher, Oscillation Amplitude is smaller, and therefore when actual measurement, capacitance change is still smaller, and therefore detection sensitivity can be very limited too, is difficult to the electrostatic or the electrostatic field that detect tiny area.
This just proposes new requirement to electrostatic transducer and electrostatic detection method thereof.
Summary of the invention
In view of this, the invention provides a kind of Non-contact static detection device, the feature there are mechanical parts, coupling capacitance variable quantity is large, highly sensitive, sensor design flexible, easily realizing; By the selection to electrostatic transducer, can to carry out in real time tiny area electrostatic or faint electrostatic, absolute measurement.
In order to achieve the above object, Non-contact static detection device of the present invention, comprises electrostatic transducer, electronic switch and electric signal processing unit;
Described electrostatic transducer comprises induction electrode and coupling electrode, and induction electrode is a metallic electrostatic signal receiving plane, and coupling electrode is a metallic electrode, and the two is static, thus forms the electric capacity of a fixing capacitance; Described induction electrode is electrically connected with electronic switch, and electronic switch is all connected electric signal processing unit with coupling electrode; Described electric signal processing unit is used for controlling to make induction electrode interleaved ground or suspension by the break-make of electronic switch, also for gathering the electric signal that electrostatic transducer produces from coupling electrode, and is converted to electric field value through process.
The form Design of induction electrode and coupling electrode is relatively more flexible, and can be plate, also can be spherical.
Preferably, electric signal processing unit uses sampling resistor as sample circuit, and so coupling electrode is by sampling resistor ground connection.
The advantage that the present invention is had compared with prior art:
1, the present invention is a kind of new principle electrostatic detection technology, electrostatic induction sensor is made up of induction electrode and coupling electrode, induction electrode and coupling electrode maintain static, form the electric capacity of fixing capacitance, utilize high speed electronic switch to control the change of electrostatic induction sensor capacitance, realize the absolute measurement of electrostatic potential or electrostatic field.
2, make use of high speed electronic switch, compare Spiralism type electrode in the past or capacitance-type vibration electrostatic transducer, this sniffer does not have mechanical part, and induction electrode and coupling electrode maintain static, and therefore system stability also improves greatly.
3, electrostatic transducer capacitor design is flexible, and can be plate shaped or Spherical capacitor, induction electrode size can be as small as micron dimension, thus can detect microcell electrostatic or electric field; Induction electrode size also can be large enough to the magnitude of more than several meters, due to the size that capacitance change is exactly the fixed capacity that induction electrode and coupling electrode are formed, therefore large-area electrode can increase capacitance change, thus raising detectivity, sensitivity is unrestricted, can realize the detection to faint electrostatic field.
4, the speed of electronic switch is fast, can realize the real-time detection to Rapid Variable Design electrostatic charge or electrostatic field.
Accompanying drawing explanation
Fig. 1 is the rotary electrode structure schematic diagram of Spiralism type sensor in prior art.
Fig. 2 is structural representation of the present invention;
Wherein: 11-induction electrode, 12-coupling electrode, 2-electronic switch, 31-sampling resistor, 3-electric signal processing unit.
Fig. 3 (a) and Fig. 3 (b) is the schematic diagram of two kinds of spherical induction electrodes and coupling electrode.
Embodiment
To develop simultaneously embodiment below in conjunction with accompanying drawing, describe the present invention.
As shown in Figure 2, Non-contact static detection device of the present invention, comprises electrostatic transducer 1, electronic switch 2 and electric signal processing unit 3.
Electrostatic transducer 1 comprises induction electrode 11 and coupling electrode 12.Induction electrode 11 is a metallic electrostatic signal receiving plane, and coupling electrode 12 is a metallic electrode, the two transfixion, forms the electric capacity of a fixing capacitance.In actual applications, without particular limitation of the size, version, distance etc. of induction electrode 11 and coupling electrode 12, as long as the two capacitance forming electric capacity is fixed.
In the present embodiment, induction electrode 11 and coupling electrode 12 adopt plate, and as shown in Figure 2, two electrodes are made by metal circular aluminium flake.Conveniently calculate capacitance, induction electrode 11 and coupling electrode 12 be arranged in parallel.In the present embodiment, the thick 1mm of metal aluminium flake, diameter 1cm, interval 0.5mm, wherein the diameter of metal aluminium flake and interval can have influence on capacitance.
In another embodiment, induction electrode 11 and coupling electrode 12 can also adopt spherical, and as shown in Fig. 3 (a), induction electrode 11 adopts hollow metal sphere, its can 360 degree respond to/receive electrostatic field to be measured, coupling electrode 12 adopts hollow or solid metal ball.Conveniently calculate capacitance, two Metal Ball are arranged with one heart.Or as shown in Figure 3 (b), induction electrode 11 adopts sphere, coupling electrode 12 adopts hollow or solid metal ball or sphere.Above-mentioned several embodiment all belongs to radius tip electrode.
Induction electrode 11 is electrically connected with electronic switch 2, and electronic switch 2 connects electric signal processing unit 3.Electric signal processing unit 3 makes induction electrode 11 interleaved ground or suspension for the break-make by controlling electronic switch 2.In the present embodiment, the ON/OFF pulsewidth of electronic switch 2 selects 3 microseconds, and it is greater than electronic switch rising edge width.
Electric signal processing unit 3 is connected with coupling electrode 12, gathers the electric signal of electrostatic transducer generation, and be converted to electric field value through process from coupling electrode 12.Electric field value can also obtain the charge value of measurand through conversion.
In the present embodiment, adopt electric signal processing unit 3 to adopt sampling resistor to gather electrostatic transducer 1 and produce AC signal.So, electric signal processing unit 3 comprises sampling resistor 31, electronic switch driving circuit, signal amplification circuit, filtering circuit, rectification circuit and single chip circuit.Wherein, coupling electrode 12 is by sampling resistor 31 ground connection; Electronic switch driving circuit is electrically connected with electronic switch 3, for controlling to make induction electrode 11 interleaved ground or suspension by the break-make of electronic switch 2; The input end of signal amplification circuit is electrically connected with sampling resistor 31, and the output terminal circuit connection rectification circuit after filtering of signal amplification circuit, rectification circuit is all connected with the I/O port of single chip circuit with the control signal input end of electronic switch driving circuit.Single chip circuit controls electronic switch by realizing electronic switch driving circuit, is also responsible for signal transacting.The implementation of this employing sampling resistor is simple, and required device is few.In the present embodiment, the resistance value of sampling resistor 31 is 1 megaohm.
The workflow of this device is:
Start up system, electric signal processing unit 3 controls electronic switch 2 break-make, make induction electrode 11 interleaved ground or suspension, coupling electrode 12 alternately occurs " 0 " current potential and induced potential, sampling resistor 31 forms an alternate electrical signal, this signal is by after the amplification in electric signal processing unit 3, filtering and rectification circuit, become the electric signal of 0 ~ 5 volt, through conversion, obtain electric field value, charge value can also be obtained further, be shown on the liquid crystal display of electric signal processing unit 3.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a Non-contact static detection device, comprise electrostatic transducer (1), electronic switch (2) and electric signal processing unit (3), described electrostatic transducer (1) comprises induction electrode (11) and coupling electrode (12), induction electrode (11) is a metallic electrostatic signal receiving plane, coupling electrode (12) is a metallic electrode, and the two forms the electric capacity of a fixing capacitance; Described induction electrode (11) is electrically connected with electronic switch (2), it is characterized in that: electronic switch (2) is all connected electric signal processing unit (3) with coupling electrode (12); Described electric signal processing unit (3) makes induction electrode (11) interleaved ground or suspension for the break-make by controlling electronic switch (2), also for gathering the alternate electrical signal that electrostatic transducer (1) produces from coupling electrode (12), and be converted to electric field value through process.
2. device as claimed in claim 1, it is characterized in that, described induction electrode (11) and coupling electrode (12) are plate.
3. device as claimed in claim 1, it is characterized in that, described induction electrode (11) and coupling electrode (12) are spherical.
4. device as claimed in claim 1, it is characterized in that, described electric signal processing unit (3) adopts sampling resistor (31) as electrical signal collection parts, and coupling electrode (12) is by sampling resistor (31) ground connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310154390.3A CN103235195B (en) | 2013-04-28 | 2013-04-28 | A kind of Non-contact static detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310154390.3A CN103235195B (en) | 2013-04-28 | 2013-04-28 | A kind of Non-contact static detection device |
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| CN103235195A CN103235195A (en) | 2013-08-07 |
| CN103235195B true CN103235195B (en) | 2015-07-29 |
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| CN105807976B (en) | 2014-12-31 | 2019-02-12 | 清华大学 | Electrostatic transducer |
| CN105807973B (en) | 2014-12-31 | 2019-01-18 | 清华大学 | Electrostatic transducer |
| CN105807144B (en) | 2014-12-31 | 2019-01-18 | 清华大学 | Electrometer |
| CN105808030B (en) | 2014-12-31 | 2018-10-02 | 清华大学 | Electrostatic transducer |
| CN105807975B (en) | 2014-12-31 | 2019-01-18 | 清华大学 | Hovering control device |
| CN105807971B (en) | 2014-12-31 | 2019-01-18 | 清华大学 | Electrostatic transducer |
| CN105807970B (en) | 2014-12-31 | 2018-08-17 | 清华大学 | Hovering control device |
| CN105807145B (en) * | 2014-12-31 | 2019-01-18 | 清华大学 | Electrometer |
| CN105808031B (en) | 2014-12-31 | 2019-01-18 | 清华大学 | Electrostatic method for sensing |
| CN105807974B (en) | 2014-12-31 | 2018-09-11 | 清华大学 | Touch and hover sensing device further |
| CN105807977B (en) | 2014-12-31 | 2019-02-12 | 清华大学 | Touch and hover sensing device |
| TWI639010B (en) | 2017-12-28 | 2018-10-21 | 財團法人工業技術研究院 | Electrostatic detecting device |
| CN110554252B (en) * | 2019-09-27 | 2021-11-23 | 萧县众科电磁检测有限公司 | Electrostatic tester |
| CN111257654B (en) * | 2020-01-22 | 2020-10-27 | 深圳成智达科技有限公司 | Alternating current electric field measuring device |
| CN111812411B (en) * | 2020-06-30 | 2023-05-30 | 上海电力大学 | Atmospheric electric field sensor driven to simulate rotation through electronic switch |
| CN114137325B (en) * | 2021-11-30 | 2022-09-27 | 中国人民解放军陆军工程大学 | Bionic circuit, system and method for non-contact electrostatic potential distribution test |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1583236A1 (en) * | 2004-03-30 | 2005-10-05 | Aisin Seiki Kabushiki Kaisha | Capacitance change detection device |
| CN201503445U (en) * | 2009-09-21 | 2010-06-09 | 房千贺 | Textile and fibrous material electrostatic detector |
| CN201637786U (en) * | 2010-02-09 | 2010-11-17 | 北京华云东方探测技术有限公司 | Detecting device for atmosphere electric field |
| CN202230112U (en) * | 2011-09-28 | 2012-05-23 | 上海安平静电科技有限公司 | Portable static detection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6050303B2 (en) * | 1978-06-27 | 1985-11-07 | 株式会社リコー | electrometer |
-
2013
- 2013-04-28 CN CN201310154390.3A patent/CN103235195B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1583236A1 (en) * | 2004-03-30 | 2005-10-05 | Aisin Seiki Kabushiki Kaisha | Capacitance change detection device |
| CN201503445U (en) * | 2009-09-21 | 2010-06-09 | 房千贺 | Textile and fibrous material electrostatic detector |
| CN201637786U (en) * | 2010-02-09 | 2010-11-17 | 北京华云东方探测技术有限公司 | Detecting device for atmosphere electric field |
| CN202230112U (en) * | 2011-09-28 | 2012-05-23 | 上海安平静电科技有限公司 | Portable static detection device |
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